Orta Frekans Doğru Akım Direnç Nokta Kaynak Sistemlerinde Kullanılan Evirici Topolojilerinin İncelenmesi

Direnç nokta kaynağı (DNK), özellikle otomotiv sanayisinde yaygın bir şekilde kullanılan bir metal birleştirme yöntemidir. Endüstrideki gelişmelere paralel olarak kaynak teknolojileri de gelişmektedir. Geleneksel alternatif akım direnç nokta kaynak sistemleri (AA-DNK), yerini yeni nesil orta frekans doğru akım direnç nokta kaynak (OFDA-DNK) sistemlerine bırakmaktadır. Ayıca, OFDA-DNK, Endüstri 4.0 içerisinde önemli role sahip robotlar ile uyumlu bir şekilde çalışabilecek, enerji verimliliği yüksek yöntemlerden biridir. Bu çalışmada kaynak teknolojisinde önemli yere sahip direnç kaynak yöntemleri sınıflandırılarak yeni nesil OFDA-DNK sistemlerindeki gelişmeler incelenmiştir. İfade edilen kaynak yönteminin avantaj ve dezavantajları, geleneksel AA-DNK sistemleri ile karşılaştırılmıştır. Ayrıca güç elektroniği teknolojisine dayalı OFDA-DNK sistemlerinin evirici topolojisi incelenmiştir.

Anahtar Kelimeler:

AA/DA/AA dönüştürücü, direnç nokta kaynağı, h-köprü evirici, orta frekans doğru akım direnç nokta kaynağı

Investigation of Inverter Topologies Used in Medium Frequency Direct Current Resistance Spot Welding Systems

Resistance spot welding (RSW) is a metal joining method that is widely used, especially in the automotive industry. Welding technologies are also developing in parallel with the developments in the industry. Traditional alternating current resistance spot welding systems (AC-RSW) are being replaced by new generation medium frequency direct current resistance spot welding (MFDC-RSW) systems. In addition, MFDC-RSW is one of the high energy efficient methods that can work in harmony with robots that have an important role in Industry 4.0. In this study, resistance welding methods, which have an important place in welding technology, are classified and the developments in the new generation MFDC-RSW systems are examined. The advantages and disadvantages of the stated welding method are compared with conventional AC-RSW systems. In addition, the inverter topology of MFDC-RSW systems based on power electronics technology has been examined.

Keywords:

AC/DC/AC converter, resistance spot welding, h-bridge inverter, medium frequency direct current resistance spot welding,

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